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What is the easiest way to resolve apt-get BADSIG GPG errors?
How do I fix the GPG error “NO_PUBKEY”?

What can I do when my update package manager throws this to me?

Error authenticating some packages. Continue?

It was not possible to authenticate some packages. This may be a transient network problem. You may want to try again later. See below for a list of unauthenticated packages.

xserver-xorg-video-savage

EDIT: trying the following commands sudo apt-get update && sudo apt-get upgrade

[...]
Reading package lists... Done
W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures were invalid: BADSIG 0F678A01569113AE Launchpad Caffeine
W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B22AB97AF1CDFA9
Reading package lists... Done
[...]
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marked as duplicate by fossfreedom, Takkat, jrg Feb 15 '12 at 22:08

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added some more info as requested –  213441265152351 Feb 12 '12 at 11:47
    
also for the PUBKEY: askubuntu.com/questions/13065/… ... basically you have two PPA's you need to either disable or find their signature keys. –  fossfreedom Feb 12 '12 at 11:54

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